Subject: [FlyRotary] Re: Temps finally
down
Sounds like you are closing on the solution,
Steve, congratulations. Its
always nice when you get to the point where
you can fly without one eye on
the temps.
The boundary layer (particularly with
coolers to the rear of an airframe)
appears to play a big role. The layer
increases in depth as you go rearward
and it creates havoc with the operation of
cooling ducts and diffusers.
Great,
Steve. Glad to hear you have that issue resolved.
For
anyone interested, attached is a little DOS program that computes
boundary layer thickness. Input fuselage length, distance from
nose to scoop entrance, and aircraft speed. Of course since it
is an executable program, virus filter may take out the
attachment. If so, you can send me your data, and I'll do the
calc for you. I’ll Zip it, and it may should go
through.
Al